Stage 8 - Q10 - 5 marks
18506
Challenge: a line has gradient \(\frac{-3}{2}\) and contains points \(\left(a,\ 9\right)\) and \(\left(a+8,\ -3\right)\), where a is unknown. Does this information determine a unique line? Give two valid examples or prove uniqueness.
Hint
The difference in x is known, but is either absolute x-coordinate known?